Spiral ring



FIG. 1 is a top plan view of a spiral ring, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is an end elevational view thereof, the opposite end being the same; and

FIG. 4 is a side elevational view thereof, the opposite end being the same. 

The ornamental design for a spiral ring, substantially as shown and described. 